Cook spaghetti as per packet instructions.
In a medium fry pan, heat the oil on high heat. Cook the prawns for 1 minute on each side or until they are just cooked through. Remove from the pan; reduce heat to medium.
Add the butter and garlic to the pan and cook for 2 minutes, stirring frequently.
Pour in the cream, tomatoes, lemon juice, spinach and simmer gently for 2-3 minutes.
Drain the spaghetti then add to the sauce, toss to coat well and then stir in the prawns and parsley.
You can add more cream for a more saucy pasta.